#!/bin/bash

function addAlert() {
   alert_json=$(cat "$1")
   modified_json=$(echo "$alert_json" | sed -e "s/\${DS_UID}/$DATASOURCE_UID/g")
   curl -s -X POST "$HOST/api/v1/provisioning/alert-rules"  \
      --header "Content-type: application/json" \
      --header "X-Disable-Provenance;" \
      --data "$modified_json"
}

function addAlertV2() {
   alert_json=$(cat "$1")
   modified_json=$(echo "$alert_json" | sed -e "s/\${DS_UID}/$DATASOURCE_UID/g; s/\${BUCKET}/$BUCKET_NAME/g")
   curl -s -X POST "$HOST/api/v1/provisioning/alert-rules"  \
      --header "Content-type: application/json" \
      --header "X-Disable-Provenance;" \
      --data "$modified_json"
}

function addDashboard() {
   echo -e "{\"dashboard\": $(cat $1), \"folderUid\": \"beegfsalertfolder\"}" | \
   sed -e "s,\${DS_BEEGFS_MON_INFLUXDB},$DATASOURCE_NAME,g" | \
   curl -s -X POST "$HOST/api/dashboards/db"  \
      --header "Content-type: application/json" \
      --data @-
}

function addFolder() {
   curl -s -X POST "$HOST/api/folders" \
      --header "Content-type: application/json" \
      --data '{"uid": "beegfsalertfolder", "title": "BeeGFS-Alert"}'
}

function addTemplate() {
   curl -s -X PUT "$HOST/api/v1/provisioning/templates/BeeGFS-Email-Template" \
      --header "X-Disable-Provenance;" \
      --header "Content-Type: application/json" \
      --data "@$alert_path/email-template.json"
}

function addContactPoint() {
   curl -s -X POST "$HOST/api/v1/provisioning/contact-points" \
      --header "X-Disable-Provenance;" \
      --header "Content-Type: application/json" \
      --data "@$alert_path/contact-point.json"
}

function addPolicies() {
   update_policies=$(cat $1)
   curl -s -X PUT "$HOST/api/v1/provisioning/policies" \
      --header "X-Disable-Provenance;" \
      --header "Content-Type: application/json" \
      --data "$update_policies"
}

HOST="http://admin:admin@localhost:3000"

if  [[ $1 != "default" ]] && [[ ! $# -eq 1 ]]; then
   echo "This script imports the default beegfs-mon Alerts into Grafana using its HTTP API."
   echo ""
   echo "Usage: "
   echo "Default installation to localhost: $(basename "$0") default"
   echo "Custom installation: $(basename "$0") <grafana url>"
   echo ""
   echo "Default:"
   echo "$(basename "$0") $HOST"
   exit 0
fi

command -v curl > /dev/null 2>&1 || \
{
   echo "This script requires curl, but it doesn't seem to be installed. Aborting."
   exit 1
}

if [[ $1 != "default" ]]; then
   HOST="$1"
fi

echo "Select an option:"
echo "1. Using BeeGFS Monitoring with Telegraf"
echo "2. Using BeeGFS Monitoring without Telegraf"

read -p "Enter your Option: " option

if [[ "$option" == "1" ]]; then
      monType="wtelegraf"
elif [[ "$option" == "2" ]]; then
      monType="wotelegraf"
else
      echo "*** Please select correct option ***"
      exit 1
fi

echo "Select an option:"
echo "Please select influxdb version:"
echo "1) Influxdb 1.x"
echo "2) Influxdb 2.x"

read -p "Enter your influxdb Verion: " influxdb_version

DATASOURCE_UID=$(curl -s "$HOST/api/datasources/name/beegfs_mon_influxdb" | grep -o '"uid": *"[^"]*"' | cut -d'"' -f4)
DATASOURCE_NAME=$(curl -s "$HOST/api/datasources/name/beegfs_mon_influxdb" | grep -o '"name": *"[^"]*"' | cut -d'"' -f4)

if [[ "$influxdb_version" == "2" ]]; then
   BUCKET_NAME=$(curl -s "$HOST/api/datasources/name/beegfs_mon_influxdb" | grep -o '"defaultBucket": *"[^"]*"' | cut -d'"' -f4)
fi

ALERT_DIR=$(dirname "$0")
alert_path="$ALERT_DIR/alerts"
addFolder


if [[ "$influxdb_version" == "1" ]] && [[ "$monType" == "wtelegraf" ]]; then

   for alert_file in "$alert_path"/*-v1.json; do
      if [ -f "$alert_file" ]; then
         addAlert "$alert_file"
      fi
   done

elif [[ "$influxdb_version" == "2" ]] && [[ "$monType" == "wtelegraf" ]] ; then

   for alert_file in "$alert_path"/*-v2.json; do
      if [ -f "$alert_file" ]; then
         addAlertV2 "$alert_file"
      fi
   done

elif [[ "$influxdb_version" == "1" ]] && [[ "$monType" == "wotelegraf" ]] ; then

   addAlert $alert_path/Disk-alert-v1.json
   addAlert $alert_path/Inodes-alert-v1.json
   addAlert $alert_path/MetaQueuedrequest-alert-v1.json
   addAlert $alert_path/StorageQueuedrequest-alert-v1.json

elif [[ "$influxdb_version" == "2" ]] && [[ "$monType" == "wotelegraf" ]] ; then

   addAlertV2 $alert_path/Disk-alert-v2.json
   addAlertV2 $alert_path/Inodes-alert-v2.json
   addAlertV2 $alert_path/MetaQueuedrequest-alert-v2.json
   addAlertV2 $alert_path/StorageQueuedrequest-alert-v2.json

else
   echo "*** Please select correct version of InfluxDB ***"
   exit 1

fi

addDashboard "$alert_path/alert-dashboard.json"
addTemplate
addContactPoint

if [[ "$monType" == "wotelegraf" ]]; then
   addPolicies "$alert_path/policies.json"
elif [[ "$monType" == "wtelegraf" ]] ; then
   addPolicies "$alert_path/policies-telegraf.json"
else
  echo "*** Please notification policies ***"
fi

echo -e "\n\n\n######### Alert is configured. Next step: update email address in contact point of beegfs-email. #########"